Function run

plugins/plugin-typescript/plugin.js:7–37

({isDev, log})

  return {
    name: '@snowpack/plugin-typescript',
    async run({isDev, log}) {
      const workerPromise = execa.command(
        `${tsc ? tsc : 'tsc'} ${args ? args : ''} --noEmit ${isDev ? '--watch' : ''}`,
        {
          env: npmRunPath.env(),
          extendEnv: true,
          windowsHide: false,
          cwd: snowpackConfig.root || process.cwd(),
        },
      );
      const {stdout, stderr} = workerPromise;
      function dataListener(chunk) {
        let stdOutput = chunk.toString();
        // In --watch mode, handle the "clear" character
        if (stdOutput.includes('\u001bc') || stdOutput.includes('\x1Bc')) {
          log('WORKER_RESET', {});
          stdOutput = stdOutput.replace(/\x1Bc/, '').replace(/\u001bc/, '');
        }
        log('WORKER_MSG', {msg: stdOutput});
      }
      stdout && stdout.on('data', dataListener);
      stderr && stderr.on('data', dataListener);
      return workerPromise.catch((err) => {
        if (/ENOENT/.test(err.message)) {
          log('WORKER_MSG', {
            msg: 'WARN: "tsc" run failed. Is typescript installed in your project?',
          });
        }
        throw err;
      });
    },
  };
}